ShapeDetection: Holding all of mock service to prevent GC

third_party/WebKit/LayoutTests/TestExpectations

 # Intentional failures to test the layout test system.
 Bug(intentional) harness-tests/crash.html [ Crash ]
 Bug(intentional) harness-tests/timeout.html [ Timeout ]
 
 # TODO(qyearsley): Remove these lines and uncomment other test expectation
 # lines related to CSS tests (crbug.com/706118).
 crbug.com/706118 external/wpt/css/css-scoping-1 [ Skip ]
 crbug.com/706118 external/wpt/css/css-shapes-1 [ Skip ]
 crbug.com/706118 external/wpt/css/css-text-3 [ Skip ]
 crbug.com/706118 external/wpt/css/css-text-decor-3 [ Skip ]
@@ skipping 3360 matching lines @@
 crbug.com/681468 fast/forms/suggestion-picker/date-suggestion-picker-appearance-zoom200.html [ Failure Pass ]
 
 crbug.com/683800 [ Win7 Debug ] external/wpt/selection/ [ Failure Pass ]
 
 # CQ and Rebaseline-cl for crrev.com/2626973005 does not include this
 crbug.com/680407 [ Mac ] fast/forms/select/menulist-appearance-basic.html [ NeedsManualRebaseline ]
 
 # No mock Mojo interface for services yet
 crbug.com/659139 [ Mac ] http/tests/shapedetection/shapedetection-cross-origin.html [ Skip ]
 crbug.com/659139 [ Mac ] virtual/mojo-loading/http/tests/shapedetection/shapedetection-cross-origin.html [ Skip ]
-#crbug.com/659139 [ Mac ] shapedetection/detection-HTMLCanvasElement.html [ Skip ]
+crbug.com/659139 [ Mac ] shapedetection/detection-HTMLCanvasElement.html [ Skip ]
 crbug.com/659139 [ Mac ] shapedetection/detection-HTMLImageElement.html [ Skip ]
 crbug.com/659139 [ Mac ] shapedetection/detection-HTMLVideoElement.html [ Skip ]
 crbug.com/659139 [ Mac ] shapedetection/detection-ImageBitmap.html [ Skip ]
 crbug.com/659139 [ Mac ] shapedetection/detection-ImageData.html [ Skip ]
 crbug.com/659139 [ Mac ] shapedetection/detection-options.html [ Skip ]
 
 # Importing 'fetch' tests from WPT.
 crbug.com/705490 external/wpt/fetch/api/basic/error-after-response.html [ Timeout Pass ]
 
 # Non-deterministic output, as the failing subtests dump timestamps.
@@ skipping 36 matching lines @@
 crbug.com/703518 virtual/threaded/inspector/tracing/worker-js-frames.html [ Failure Pass ]
 crbug.com/703533 [ Mac ] shapedetection/detection-security-test.html  [ Crash Failure Pass Timeout ]
 crbug.com/674720 http/tests/loading/preload-img-test.html [ Pass Failure ]
 crbug.com/674720 virtual/mojo-loading/http/tests/loading/preload-img-test.html [ Pass Failure ]
 
 crbug.com/708499 fast/compositor-wheel-scroll-latching/touchpad-scroll-impl-to-main.html [ Pass Timeout ]
 crbug.com/708499 virtual/wheelscrolllatching/fast/compositor-wheel-scroll-latching/touchpad-scroll-impl-to-main.html [ Pass Timeout ]
 
 crbug.com/706091 [ Linux ] virtual/wheelscrolllatching/fast/events/wheel/wheel-scroll-latching-on-scrollbar.html [ Failure Pass ]
 
-# Sheriff failures 2017-04-03
-# Should be [ Crash Pass ], but this has a commented out [ Skip ] expectation
-# for Mac earlier in the file, so just skip it everywhere.
-crbug.com/707689 shapedetection/detection-HTMLCanvasElement.html [ Skip ]
-
 # Sheriff failures 2017-04-19
 crbug.com/713094 [ Win ] virtual/sharedarraybuffer/fast/css/fontfaceset-check-platform-fonts.html [ Failure Pass ]
 
 # Tests to be run only under virtual/experimental-canvas-features/
 crbug.com/682753 fast/canvas-experimental [ Skip ]
 
 crbug.com/713050 tables/mozilla/bugs/bug113424.html [ Failure Pass ]
 
 crbug.com/708934 fast/backgrounds/background-image-relative-url-in-iframe.html [ Failure Pass ]
 
 # Skip tests for vibrate with feature policy
 crbug.com/710850 http/tests/feature-policy/vibrate-enabledforall.php [ Skip ]
 crbug.com/710850 http/tests/feature-policy/vibrate-enabledforself.php [ Skip ]
 crbug.com/710850 http/tests/feature-policy/vibrate-disabled.php [ Skip ]
 crbug.com/710850 virtual/feature-policy/http/tests/feature-policy/vibrate-enabledforall.php [ Skip ]
 crbug.com/710850 virtual/feature-policy/http/tests/feature-policy/vibrate-enabledforself.php [ Skip ]
 crbug.com/710850 virtual/feature-policy/http/tests/feature-policy/vibrate-disabled.php [ Skip ]
 crbug.com/710850 virtual/mojo-loading/http/tests/feature-policy/vibrate-enabledforall.php [ Skip ]
 crbug.com/710850 virtual/mojo-loading/http/tests/feature-policy/vibrate-enabledforself.php [ Skip ]
 crbug.com/710850 virtual/mojo-loading/http/tests/feature-policy/vibrate-disabled.php [ Skip ]
 
 crbug.com/713509 crypto/subtle/worker-subtle-crypto-concurrent.html [ Pass Timeout ]
 
 crbug.com/713685 [ Linux ] fast/workers/termination-early.html [ Crash Pass ]
 crbug.com/713685 [ Linux ] virtual/sharedarraybuffer/fast/workers/termination-early.html [ Crash Pass ]